Custom Prom VATS Disable
Thread Starter
Burning Brakes
Joined: Nov 2002
Posts: 1,239
Likes: 1
From: Las Vegas NV
Custom Prom VATS Disable
Hi guys, I have a 93 Corvette and years ago I had a custom piggyback prom made and everything has been fine until recently. My VATS system is acting up and I wondered if someone here could disable the VATS system in my computer for me.
Thanks
Chris
Thanks
Chris
Le Mans Master
Joined: May 1999
Posts: 6,513
Likes: 1,301
From: Windermere FL
Chris,
The program in the ECM is only one peice of the VATS for your year. There is a signal that comes from the CCM to tell the ECM to cut off the injector pulse if the VATS goes off. So fixing the PROM will not cure your problem as you will still not be able to start your car.
Your best bet is to go with one of the plug and play VATS eliminators that are available. I got the one from Mid America. There are others that go from the simple to the expensive.
The program in the ECM is only one peice of the VATS for your year. There is a signal that comes from the CCM to tell the ECM to cut off the injector pulse if the VATS goes off. So fixing the PROM will not cure your problem as you will still not be able to start your car.
Your best bet is to go with one of the plug and play VATS eliminators that are available. I got the one from Mid America. There are others that go from the simple to the expensive.
Thread Starter
Burning Brakes
Joined: Nov 2002
Posts: 1,239
Likes: 1
From: Las Vegas NV
Chris,
The program in the ECM is only one peice of the VATS for your year. There is a signal that comes from the CCM to tell the ECM to cut off the injector pulse if the VATS goes off. So fixing the PROM will not cure your problem as you will still not be able to start your car.
Your best bet is to go with one of the plug and play VATS eliminators that are available. I got the one from Mid America. There are others that go from the simple to the expensive.
The program in the ECM is only one peice of the VATS for your year. There is a signal that comes from the CCM to tell the ECM to cut off the injector pulse if the VATS goes off. So fixing the PROM will not cure your problem as you will still not be able to start your car.
Your best bet is to go with one of the plug and play VATS eliminators that are available. I got the one from Mid America. There are others that go from the simple to the expensive.
Le Mans Master
Joined: Aug 2000
Posts: 8,838
Likes: 31
From: Australia
(VATS is part of CCM on late cars;was standalone unit on early ones )
If you are doing this because VATS components are faulty and you have VATS programmed out , you will need to manually bypass the starter enable relay also controlled by VATS
Last edited by rodj; Nov 14, 2010 at 06:36 PM.
Thread Starter
Burning Brakes
Joined: Nov 2002
Posts: 1,239
Likes: 1
From: Las Vegas NV
The injector enable is what I am having problems with, after my sits for a few hours it will crank but not start. If I let it sit an additional 3 minutes it fires right up. I checked for codes and no codes present, I do not wish to diagnose further I would prefer to remove VATS form the car.
Instructor
Joined: Aug 2010
Posts: 200
Likes: 1
From: Somers N.Y.
vats
If you go to Eklers you will find vats by pass kits. You will have to read the instructions they give you to get the right one. good luck
Racer
Joined: Jul 2010
Posts: 308
Likes: 2
From: Kansas City MO
The injector enable is what I am having problems with, after my sits for a few hours it will crank but not start. If I let it sit an additional 3 minutes it fires right up. I checked for codes and no codes present, I do not wish to diagnose further I would prefer to remove VATS form the car.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
2027 Corvette vs The World: Every C8 vs Its Closest Competitor
Joe Kucinski
10 Most Common Corvette Problems of the Last 20 Years!
Joe Kucinski
Instructor
Joined: Jul 2011
Posts: 116
Likes: 0
From: Hastings Florida
The injector enable is what I am having problems with, after my sits for a few hours it will crank but not start. If I let it sit an additional 3 minutes it fires right up. I checked for codes and no codes present, I do not wish to diagnose further I would prefer to remove VATS form the car.
If you can just simply get a PROM with vats eliminated that should save you all the grief that I'm about to take the dealership to court over for incompetence and mental anquish.
3rd Gear
Joined: Aug 2012
Posts: 3
Likes: 0
Resolution?
Did you ever get your car fixed?
I have a 92/auto with similar issue (well I can't get it to stay running at all). and there is a lose cylinder w/ key under the dash as well.
I may have to start my own thread too.
I have a 92/auto with similar issue (well I can't get it to stay running at all). and there is a lose cylinder w/ key under the dash as well.
I may have to start my own thread too.
Le Mans Master
Joined: Aug 2000
Posts: 8,838
Likes: 31
From: Australia
Better to do it in the Tech section where it will get better response
http://forums.corvetteforum.com/c4-tech-performance-48/
Race Director
Joined: Apr 2002
Posts: 10,036
Likes: 346
From: Anaheim CA
VATS does two things if it reads the key resistor pellet correctly when the ignition is turned on: enable starter relay and send 30 Hz square wave to the ECM, which enables the injectors (later ECMs have the VATS function inside).
If your car cranks, then it's about 99.99% certain that the problem is not VATS related.
If the ECM sees ignition-on but does not see the 30 Hz VATS signal then it will set error code 46.
If your car cranks, then it's about 99.99% certain that the problem is not VATS related.
If the ECM sees ignition-on but does not see the 30 Hz VATS signal then it will set error code 46.
